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On the Superstability of the Pexider Type Trigonometric Functional Equation

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Abstract

We will investigate the superstability of the (hyperbolic) trigonometric functional equation from the following functional equations: and, which can be considered the mixed functional equations of the sine function and cosine function, the hyperbolic sine function and hyperbolic cosine function, and the exponential functions, respectively.

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Correspondence to GwangHui Kim.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kim, G. On the Superstability of the Pexider Type Trigonometric Functional Equation. J Inequal Appl 2010, 897123 (2010) doi:10.1155/2010/897123

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Keywords

  • Functional Equation
  • Exponential Function
  • Full Article
  • Sine Function
  • Cosine Function